A generalization of Condorcet’s Jury Theorem to weighted voting games with many small voters

We extend Condorcet’s Jury Theorem (Essai sur l’application de l’analyse à la probabilité des décisions rendues à la pluralité des voix. De l’imprimerie royale, 1785) to weighted voting games with voters of two kinds: a fixed (possibly empty) set of ‘major’ voters with fixed weights, and an ever-increasing number of ‘minor’ voters, whose total weight is also fixed, but where each individual’s weight becomes negligible. As our main result, we obtain the limiting probability that the jury will arrive at the correct decision as a function of the competence of the few major players. As in Condorcet’s result the quota q = 1/2 is found to play a prominent role. I wish to thank Maurice Koster, Moshé Machover, Guillermo Owen and two anonymous referees for helpful comments.     

古典框架下的交易网络形成与发展分析

网络因利益而产生，也因参与主体的利益追逐而发展，利益是网络发展的激励因素。本从网络发展的动态性出发，在古典经济学的分析框架内，运用博弈论，从供需角度来对网络的形成和发展进行分析，得出网络是自发动态发展的，网络参与为了获得利益而相互竞争推动创新和分工的细化以及网络的更新发展的结论，最后提炼出网络的本质特点。     

Probability theory in fuzzy sample spaces

This paper tries to develop a neat and comprehensive probability theory for sample spaces where the events are fuzzy subsets of The investigations are focussed on the discussion how to equip those sample spaces with suitable -algebras and metrics. In the end we can point out a unified concept of random elements in the sample spaces under consideration which is linked with compatible metrics to express random errors. The result is supported by presenting a strong law of large numbers, a central limit theorem and a Glivenko-Cantelli theorem for these kinds of random elements, formulated simultaneously w.r.t. the selected metrics. As a by-product the line of reasoning, which is followed within the paper, enables us to generalize as well as to bring together already known results and concepts from literature.Acknowledgement. The author would like to thank the participants of the 23rd Linz Seminar on Fuzzy Set Theory for the intensive discussion of the paper. Especially he is indebted to Professors Diamond and Höhle whose remarks have helped to get deeper insights into the subject. Additionally, the author is grateful to one anonymous referee for careful reading and valuable proposals which have led to an improvement of the first draft.This paper was presented at the 23rd Linz Seminar on Fuzzy Set Theory, Linz, Austria, February 5–9, 2002.     

三维激光扫描仪在地形测量中的应用

文章从三维激光扫描仪在测量中的作用入手,详细介绍了三维激光扫描仪的工作原理和三维激光扫描系统,并说明了三维激光扫描仪配套三维数据处理软件的功能,着重介绍了三维数据的处理方法:点云的连接、特征线的提取、对地物的三维建模(TIN建模),在TIN建模中,介绍了狄洛尼三角网的构网方法。     

Binary effectivity rules

A social choice rule (SCR) is a collection of social choice correspondences, one for each agenda. An effectivity rule is a collection of effectivity functions, one for each agenda. We prove that every monotonic and superadditive effectivity rule is the effectivity rule of some SCR. A SCR is binary if it is rationalized by an acyclic binary relation. The foregoing result motivates our definition of a binary effectivity rule as the effectivity rule of some binary SCR. A binary SCR is regular if it satisfies unanimity, monotonicity, and independence of infeasible alternatives. A binary effectivity rule is regular if it is the effectivity rule of some regular binary SCR. We characterize completely the family of regular binary effectivity rules. Quite surprisingly, intrinsically defined von Neumann–Morgenstern solutions play an important role in this characterization.     

新历史学派、德国实践与我国医疗改革——兼论我国医疗保障改革设想

德国新历史学派是19世纪最主要的经济思想之一，其主要观点在抨击自由经济主义的同时，也为德意志帝国社会保障体系的建立提供了直接理论基础。而当今德国的医疗保障实践则是政府主导、市场参与的“混合型”医疗保障模式，这充分综合了政府和市场两种资源配置方式的优势。德国新历史学派的主要观点和德国实践经验对我国当前的医疗改革有较好的指导意义。我国医改必须重新对政府与市场在医疗保障改革中进行合理定位、明确边界，建立国家主导、市场参与的“混合型”医疗保障模式。市场化或者国家统管的医疗改革方案都是违背理论规律和历史实践的。     

1994-2002年人民币汇率制度及其经济绩效的实证分析

人民币实际汇率对进出口的影响较名义汇率大，汇率下降可以成功地带动出口，汇率上升也可以减少出口，但对进口影响不大。人民币汇率变动与利用外资之间没有互动关系，甚至呈现异动情况，人民币汇率变动与国内物价水平之间有较高的相关性。     

试析中国的市场经济地位——用发展的眼光看待中国市场经济问题

中国的市场经济地位问题既是国际经贸界的热点问题,又是事关中国改革开放的发展问题。本文对中国的市场经济地位问题及欧美等国的态度作了分析,指出既要做好主要发达国家的工作,又要把改革开放推向深化,从而完善社会主义市场经济建设。     

渝西地区小城镇建设问题研究

以渝西地区为例，根据该地区的实际情况，从宏观、微观相结合的角度提出该地区小城镇建设的构想，并具体分析了小城镇建设过程中应该做好的对内、对外两方面的工作及应该注意的问题，鉴于小城镇建设离不开一二三产业的发展，因此本也对相关的产业发展问题进行了探讨。     

西部物流产业发展中的政府宏观调控

在入世的背景下，物流日益得到了全社会和各企业的高度重视，这不仅符合现代经济的发展趋势，也是值得我国大力发展的领域。但是，与此同时，我们也应看到，现代物流产业的发展决不是一件简单的事情，也并非一蹴而就，它是经济发展到一定程度，在政府的宏观调控下以及企业的积极实践和不断努力的结果。因此，在西部物流产业的发展中，政府应当发挥其重要的规划、引导、协调作用，使西部物流管理水平得到极大提高，使西部物流实现现代化。